90 Mr. F. 0. P. Cambiidge on Ctemform Spiders 



Stenoctenus (gracilis to Senoculus,2iX\di convinced that it was 

 an eiglit-eyed form, gave it the name Plati/ctenus, on the 

 grounds that Senoculus was inappropriate. The latter 

 name having been obviously given under a misapprehension^ 

 it seems reasonable to modify in such cases the strict letter 

 of the laws of nomenclature. But if one begins to discard 

 names on the ground of inappropriateness, where is the 

 process to stop ? I therefore would regard Platyctenus as 

 a synonym of Senoculus. 



1872. Senoculus maronicus, Tacz. 2 , 6 mm. Hor. Soc 

 Ent. Ross. ix. p. 108, t. iii. fig. 4. Tyjie of genus, only 

 species described. St. Laurent de Maroni. 



1879. Senoculus rubromaculatus, Keys. $ , 8'5 mm. Verb, 

 z.-b. Ges. Wien, p. 339, pi. iv. fig. 30. Peru. 



Genus Labdacus, Cambr., 1873. 



1873. Labdacus monastoides, Cambr. $ , 9*5 mm. Proc. 

 Zool. Soc. Lond. p. 118. Type in coll. O. P. C. Rio 

 Grande, Brazil. 



1880. L. phmosvs, Sim. $, carap. 3*6 mm. Bull. Soc. 

 Zool. Fr. p. 154. Par.4, Brazil. 



ISSO. L. purpureas, Sim. $ , 8*5 mm. Bull. Soc. Zool. Fr. 

 p. 155. Panama. 



1880. L. parallehis, Sim. ? , 8*6 mm. Bull. Soc. Zool. Fr. 

 p. 156. Teffd, Upper Amazons, Brazil. 



ISSO. L. rufcapillus, Sim. ^J $ , 9-5 mm. Bull. Soc. Zool. 

 Fr. p. 154. Par£, Brazil. 



1880. L. tricolor, Sim. ^ ? , 125 mm. Bull. Soc. Zool. 

 Fr. p. 153. Teff<?, Upper Amazons, Brazil. 



Table of Species (after Simon). 



A. Carapace and abdomen clothed "with plumose 



hairs, 



1. Carapace -with strife stroiiply marlicd L. plumosus, Sim. 



2. Carapace -svith strife scarcely noticeable L. tricolor, Sim. 



B. Carapace and abdomen clothed with simple hairs, 

 i. Legs short. Tibiic i. and ii. with 4 — 4 (or 5 — 6) 



long spines beneath. 



a. Posterior eyes very large. Centrals a little 



less than their diameter apart, scarcely 1^ 



diameter from laterals L. ruficapUlus^ Sim. 



b. Posterior eyes moderate in size. Centrals 



